Steam-boiler and furnace



5 Sheets-Sheet 1.

0.1). mms.

Patented Ma-L19, 1895.

STEAM BOILER AND 'PURNAGR (No Model.) N0. 535,'853.

(No Model.) 5 Sheets- Sheet 3.

0. D. ORVIS. STEAM BOILBR AND PURNAGE. No. 535,853. l Patented Mar.v 19, 1895.

il' E'.

' f E?? -OM (No Mdel.) 5 Sheets-Sheet 4. 0. D. ORVIS.

STEAM BOILER AND PURNAGB. No. 535,853. I Patented Mar. 19, 1895.

5 Sheets-Sheet 5.

Patented Mar. 19, 1895. 5

` 0. D. ORVIS. STEAM BOILBR AND PURNAQE.

(No Model.)

www

NTTED STATES PATENT OFFICE.

STEAlVl-#BOILER` AND FU RNACE.

SPECIFICATION forming part of Letters Patent No. 535,853, dated March 19, 1895.

Application led June 11, 1 8 94.

To @ZZ whom it may concern:

Be it known that I, OREL D. ORvIs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam-Boilers and Furnaces; and I do declare the following to be a full, clear, and

exact description of the invention, such aswill enable others skilled in the art to which 1t appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked hereon, which form a part of this specificaion.

My invention relates to steam boilers and their furnaces, and particularly to the class of steam'boilers known as water tube boilers.

The object of the invention is to secure such a construction of the boiler as will insure free and rapid circulation of the water, and expose the largest possible area of Water surface to the influence of the heated vapors, and the furnace is so constructed as to carry the line of `draft in what I conceive to be the most serviceable relation to the several parts of the boiler.

The invention consists in the use of three horizontal cylinders or chambers, one above and two below, and a novel arrangement of tubes for connecting the lower cylinders with the upper one.

It consists further in the novel construction of partition walls, so as to convey the hot gases in the desired manner around the cylinders and among the tubes.

In the accompanying drawings, I show, in Figure l, a longitudinal, vertical, central, sectional view of the furnace and boiler; Fig. 2, a plan section, on the line 2-2 of Fig. l; Fig. 3, a vertical section on the line 3-3 of Fig. 2; Fig. 4, the same view on the line 4 4 of Fig. 2; Fig. 5, a vertical section on the line 5 5, of Fig. l; Fig. 6, a vertical section on the line 6 6, of Fig. l; Fig. 7, a detail plan section on the line 7-7 of Fig. 5; Fig. 8, a detail plan section on the line 8 8, of Fig. 6; Figs. 9 and lO, details, showing the arrangement of the water tubes, and the line of draft among them.

The furnace is inclosed with masonry, its

sein No. 514,173. (No miei.)

front wall being shown at A, its side Walls at A', A', and its rear wall at A2.

The main or upper cylinder of the boiler is shown at B, and extends the full length of the furnace, and the lower cylinders are shown at B', B', and are parallel with and of the same length as the cylinder B, and lie side by side, their forward ends being above the grate bars, O, and forming in fact the roof of the fire box. These cylinders are spaced apart, so as to allow a iiue opening between them, and theirl outer sides touch the side walls, A'.

Any form of grate` bars may be used, and as thereis nothing novel in the tire box and its appurtenances except its roof, I have not shown in detail its various parts. A bridge Wall, a, is built up across the rearward end of the grates, extending a few inches above them, so as to serve as a stop for fuel, and a transverse partition, a', is thrown across the furnace from side to side, and from its floor to its roof, so as to cut oif the draft entirely, except through a flue opening in this wall, as hereinafter described.

A large number of tubes, D, and D', connect each of the cylinders, B', with 'the cylinder B. As shown, these tubes are set in four longitudinal rows, in each of the cylinders B', and are spaced apart only a sufficient distanceY to admit of the free circulation of the heated vaporsamong them. The inner row of tubes, D, in each of the lower cylinders, is inclined toward the other cylinder, so that the tubes of the one cross the tubes of the other, the lower halt' of each pair of these tubes forming the letter X. At the top of the X the tubes are bent, so as to incline againV to- `ward each other, and enter the cylinder B near The three outer rows of tubes,D,

together. of each of the cylinders, B', are bent, approximately midway of their length, so as to bow outwardly slightly, the angle of these tubes being atthe same altitude as that of the tubes, D.

Extending from the front wall, A, to the partition, ct', a iiooring ot' brick, E,\is supported by the tubes D, D', at the point at which they are bent, as already described. The central portion of this flooring extends downwardly so as to fill the upper portion of the X formed by the lower parts of the tubes, D, giving the floor in cross section the form of the letter V, with extended wings at the upper ends of its arms. This Hoor, E, does not extend beyond the outer row of tubes, D'. A similar floor, E', extends backwardly from the wall, a', tothe wall A2, and vertical partitions, e, are built between these two Walls, extending from the cylinders B', to the' door, E', and being located between the two outer rows of tubes D'.

A flue opening, F, is formed in the wall, a', being bounded by the central V shaped portions of the floors, E, E' and by the inner rows of tubes, D.

A flueopening, F', is formed in the rear wall, A2, above the cylinders, B', and below the ioor E', and between the partitions, e, and leads to the smoke stack, not shown. The draft, therefore, leads from the fire box backwardly between the forward ends of the cylinders B', thence laterally in both directions among the tubes, D, D', upwardly and again to the center, passing among the same tubes, and thence backwardly through the Iiue, F, and again passing laterally among the tubes, it descends around the outer sides of the cylinders, B', space being left between the cylinders and the walls, A', back of the partition, a', the draft then continuing upwardly between the two lower cylinders and passing out v through the iue F'.

I prefer to locate ybrick piers, G, in alternate spaces between the tubes in each of the rows, D', the piers in adjacent rows being setl staggered, so that the line of draft among these tubes is tortuous.

I show at Il a mud drum, located transversely' across the rear end of the furnace, below the cylinders, B', and in communication therewith by the water legs, h.

The water feed of the boiler may be located in any desired position, and its location being entirely immaterial, I have not shown it in the drawings.

The tubes, D, D', are all so located with reference to the cylinders, B, B', that they enter them radially, such oflthe tubes as require it being bent near their ends, for this purpose. This arrangement of the tubes admits of their attachment to the cylinders by the means commonly called expanding.

The water tubes are preferably four inches in diameter, so as to allow of the passage of a large volume of water. The circulation will naturally be upwardly through the tubes in the forward portion of the furnace, that being heated to the highest degree, and downwardly through the tubes back of the partition a', and more decidedly through those at the extreme rearward end of the furnace.

Great advantages are secured in using substantially vertical tubes in that there is less friction to overcome, and consequently a freer circulation; no place for the lodgment of sediment in the tubes, and consequently less liability to the incrusting of the inner surface; no place for the accumulation of dust upon the outside of the pipes and the consequent reduction of the heating surface. a

The construction shown insures a concentration of the heat at the center of the fire box between the two cylinders B', so that the chilling of the gases by contact with these water surfaces is counteracted.

I claiml. The combination with a water tube boiler having an upper and a pair of lower cylinders and tubes for connecting the upper and lower cylinders, of a furnace having its draft passages so arranged that the draft is upwardly from the fire box, between the lower cylinders, laterally among the water tubes, upwardly and again to the central line of the furnace, backwardly to the rear portion of the furnace, laterally and downwardly outside of the lower cylinders and upwardly between the rearward end of the lower cylinders to an eduction flue, substantially as described, and for the purpose set forth. I

2. The combination with a furnace having a transverse vertical partition, a', and a set of fire grates forward of the partition, of a pair of boiler cylinders, B', extending from front to rear of the furnace and spaced apart for draft flue, a boiler cylinder, B, parallel with and above the cylinders B', water tubes connecting the lower and upper cylinders and arranged in a multiple number of rows longitudinal as to the cylinders, floors, E, E', approximately midway between the upper and lower cylinders and extending the entire length of the furnace and having draft openings at their sides, upright partitions c, e, extending `from the cylinders B' to the floor E' and from the partition et' to the rear of the furnace, a flue opening through the partition d' above the lioors E, E' and between the sets of tubes communicating with the two lower cylinders, flue openings at the outside of the lower cylinders back of the partition a', and an eduction flue opening through the rear wall of the furnace and inclosed by the door E' and the partitions e, e, substantially as described, and for the purpose set forth.

3. The combination with a furnace and with a water tube boiler having upper and lower cylinders, the draft being upwardly from the fire box between the lower cylinders, of vertical tubes connecting the upper and lower cylinders and extending through the furnace chamber, and a floor above the opening be tween the lower cylinders whereby the draft is directed amonlg the vertical tubes, substantially as described and for the purpose set forth.

4. The combination with a furnace and with a water tube boiler having upper and lower cylinders, the draft being upwardly from the IIO fire box between the lower cylinders, of verporting the Hoor, substantially as described tical tubes connecting the upper and lower and for the purpose specified. 1'o cylinders and extending through the furnace In testimony whereof I affix my signature chamber, a floor above the opening between in presence of two Witnesses.

5 the lower cylinders whereby the draft is di- OREL D. ORVIS.

rected among the vertical tubes and piers set Witnesses: in alternate spaces between the said tubes LOUIS K. GILLSON, and resting upon the lower cylinders and supi SPENCER WARD. 

